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How does a batter get a walk in baseball?

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In baseball, a batter is awarded a walk—officially known as a base on balls—when they receive four pitches during a single turn at bat that are called "balls" by the umpire.12

A pitch is designated as a ball if the batter does not swing at it and the ball does not pass through the strike zone over home plate. Once the fourth ball is called, the batter is entitled to advance safely to first base.21